java - Tomcat-Servlet 不打印所有内容

Question

我有以下代码，用于在执行 BASIC 身份验证时打印输入的用户名和密码，但是当我将代码修改为 java 程序后尝试在本地运行它时，它如何不打印它。以下是成功验证后浏览器中的输出。

下面还有我使用的 Servlet 代码。

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import java.util.Base64;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class TestServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        out.println("This is the Test Servlet");

        Enumeration headerNames = request.getHeaderNames();
        while (headerNames.hasMoreElements()) {
            String headerName = (String) headerNames.nextElement();
            out.print("<br/>Header Name: <em>" + headerName);
            String headerValue = request.getHeader(headerName);
            out.print("</em>, Header Value: <em>" + headerValue);
            out.println("</em>");
        }
        out.println("<hr/>");
        String authHeader = request.getHeader("authorization");
        out.println("User and Password in Base64 encoding--------------------------->>>" + authHeader);
        //String encodedValue = authHeader.split(" ")[1];
        String encodedValue = authHeader;
        //byte arr[] = Base64.decodeBase64(encodedValue);
        byte[] asBytes = Base64.getDecoder().decode(encodedValue);
        out.println(new String(asBytes, "utf-8")); 
        out.println("Not printing ????");
        out.println("</em>");
    }

}

Answer 1

问题是在这一行触发的:

out.println(new String(asBytes, "utf-8")); 

因为String没有这样的构造函数。您可能打算使用 this constructor :

out.println(new String(asBytes,  Charset.forName("UTF-8")));